Under specific quasi-static pressure conditions during the Valsalva manoeuvre, high-speed digital video pictures of eardrum displacements were recorded using an endoscope and a Kodak Image Ektapro 1000 Motion Analyzer. A new type of data interface enabled the complete videoclip to be saved and processed digitally, and, with special mathematical algorithms, it is possible to generate three-dimensional computer animations of eardrum movements under quasi-static pressure. The present study describes patterns of eardrum movements under static pressure changes (Valsalva manoeuvre). These patterns were consistent with the results of finite-element simulations of highly similar eardrum displacements reported by other workers.

Bally G von: Holographische Schwingungsanalyse des Trommelfelles. Laryngol Rhinol 1978;57:444–450.
Beer HJ, Bornitz M, Drescher J, Schmidt R, Hardtke H-J, Hofmann G, Vogel U, Zahnert T, Hüttenbrink K-B: Finite element modelling of the human eardrum and applications; in Hüttenbrink K-B (ed): Middle Ear Mechanics in Research and Otosurgery. Proceedings of the International Workshop on Middle Ear Mechanics, Dresden 1996. Dresden, University of Technology, 1997, pp 40–48.
Decraemer WF, Dirckx JJ, Funnell WR: Shape and derived geometrical parameters of the adult, human tympanic membrane measured with a phase-shift moire interferometer. Hear Res 1991;51:107–122.
Eiber A, Scherer I: Bewegungen des menschlichen Mittelohres. Zwischenbericht ZB–95. Stuttgart, Institute B of Mechanics, University of Stuttgart, 1997.
Helmholtz H: Die Mechanik der Gehörknöchelchen und des Trommelfelles. Arch Gesamte Physiol Mensch Tiere 1868;1:49–56.
Hess MM, Gross M: High-speed, light-intensified digital imaging of vocal fold vibrations in high optical resolution via indirect microlaryngoscopy. Ann Otol Rhinol Laryngol 1993;102:502–507.
Hüttenbrink KB: Die Mechanik der Gehörknöchelchenkette bei statischen Drucken. 1. Normales Mittelohr. Laryngol Rhinol Otol 1988;67:45–52.
KODAK Elektronic Vision Systeme: 12000 Antworten pro Sekunde. KODAK Company Print, 1993.
Tonndorf J, Khanna SM: Submicroscopic displacement amplitudes of the tympanic membrane (Cat) measured by a laser interferometer. J Acoust Soc Am 1968;44:1547–1554.
Tonndorf J, Khanna SM: Tympanic-membrane vibrations in human cadaver ears studied by time-averaged holography. J Acoust Soc Am 1972;52:1221–1233.
Vorwerk U, Hey M, Steinicke G, Begall K: Methodische Aspekte von Beobachtungen schneller Trommelfellbewegungen bei Änderung des statischen Druckes (Valsalva-Manöver) mittels digitaler Hochgeschwindigkeitsvideoaufnahmen. LaryngolRhinolOtol 1997a;76:341–346.
Vorwerk U, Hey M, Steinicke G, Begall K: High-speed digital video imaging of fast eardrum motions under static pressure changing; in Hüttenbrink K-B (ed): Middle Ear Mechanics in Research and Otosurgery. Proceedings of the International Workshop on Middle Ear Mechanics, Dresden 1996. Dresden, University of Technology, 1997b, pp 100–106.
Vorwerk U, Hey M, Steinicke G, Begall K: High-speed digital videoimaging of fast eardrum motions during Valsalva maneuver. ORL 1998;60:138–142.
Williams KR, Lesser A: Finite element analysis of the natural frequencies of vibration of the human tympanic membrane. Part 1. Br J Audiol 1990:24:319–327.
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